2 discovering with hands-on method
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This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
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This document asks several geometry questions about the number of edges, faces and vertices on different 3D shapes including: how many edges are on a triangular prism and cube; how many edges are on a cube and 3 cylinders; how many faces are on a cuboid, cone and triangular prism; and how many vertices are on 4 cubes, a cone and cylinder.
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2 discovering with hands-on method
This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
2 discovering with hands-on method
This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
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This document provides an overview of congruence shortcuts for triangles. It discusses the different ways triangles can be proven congruent, including:
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2 discovering with hands-on method
This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
2 discovering with hands-on method
This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
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2 discovering with hands-on method
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2 discovering with hands-on method
This hands-on activity instructs students to draw and cut out a triangle from paper, label and remove each interior angle, and rearrange the angles so that their vertices meet at one point with no overlap. Doing so demonstrates that the sum of the interior angles of a triangle equals 180 degrees.
Lesson plan - angle sum of triangle
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2 discovering with hands-on method
- 2. 1. On a piece of plain white paper, draw a triangle and cut it out.
- 3. 2. Label the interior of each angle and tear off each.
- 4. 3. Now tear off each corner of the triangle and rearrange the 3 “angles” so that their vertices meet at one point with no overlap.
- 5. 3. Now tear off each corner of the triangle and rearrange the 3 “angles” so that their vertices meet at one point with no overlap.
- 6. 4. What does this tell you about sum of the angles in the triangle?